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Finding the Fourth Proportional to 1,141.09, 1,714.77 and 678.96

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Solution

The fourth proportional to 1,141.09, 1,714.77 and 678.96 is: 1,020.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,141.09 : 1,714.77 = 678.96 : x
  2. Step 2: Convert to fraction form
    1,141.09/1,714.77 = 678.96/x
  3. Step 3: Cross multiply
    1,141.09x = 1,714.77 × 678.96
  4. Step 4: Simplify right side
    1,141.09x = 1,164,260.24
  5. Step 5: Solve for x
    x = 1,164,260.24/1,141.09
  6. Step 6: Final answer
    x = 1,020.31

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.